SIP Attack

5 replies
902 views

Every 3 to 5 minutes I am receiving a call that is not being recorded on the ring central server. It is even a blocked number. It usually comes in as 8889207896. Earlier in the day I think it cam in as SIP vicious 101

I believe this may be what is called a SIP attach directly to my Polycom vvx 201.

Does anyone have a resolution for this type of problem. Ringcentral support had no solution and my ISP had no solution. Is there a way to block this fake call inside the polycom phone?

hardware

J

Jessica H.

Community Manager

Hi Greg,

Check out this KB article on how to lock down the SIP ports on the router.

G

greg12345678

Author

The First Step

Thanks Jessica. I saw that one earlier but my phone is not going through my router.

B

bjsvec

The First Step

Its sounds like your phone is exposed to direct inbound internet connections. That is dangerous and you need to get the phone behind a firewall or at the very least behind your providers router/modem without any inbound ports open to the phone(s).

R

robert-dela-merced

New Participant

In our situation, it is the opposite: our RingCentral phones will make outbound calls every few minutes to a recently dialed number. It will go on for hours until you yank the power off the phone. Has anyone experienced this before?

D

david-16

New Participant

I've read the KB Article and we all work from home. Where do I enter these ip addresses? Our phones are set up through Ringcentral's website, we don't use RIngCentral cloud. Help?

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